hodges



(No Model.) 2 Sheets-Sheet. 1..

I. A. TURNER.

COMPOUND STEAM ENGINE.

No. 321,325. Patented June 30, 1885.

WITNESSES INVBNTOR 5 ATTORNEY 2 sheets-sheet 2. 1

(No Model.)

I. A. TURNER.

COMPOUND STEAM ENGINE.

No. 321,325 Patented June 30, 1885.

INVENTUR WITNESSES:

W @P QM 7. ffmfwtv ATTORNEY rvrrn STaTns PATENT (Ditties,

ISAAC A. TURNER, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO HENRY G. HODGES, CHARLES C. HODGES, CLARENCE B. HODGES, AND

CHARLES H. HODGES, OF SAME PLACE.

COMPOUND STEAM-ENGINE,

SPECIFECATEUN forming part of Letters Patent No. 321,325, dated June 30, 1885.

Appiicaiion lilcd March 12, 18.54. Renewed Jane S, 1885. (No model.)

To all whom it may concern.-

Be it known that I, ISAAC A. TURXERpi'Detroit, in the county of 'Wayne and State of Michigan, have invented new and useful Int 5 provementsin Compound Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to certain new and useful improvements in the construction of steam-engines, whereby the motion of the piston is required at times to be reversed, as in all marineengincs, elevator-engines, and others designed for similar work.

Vvhile Isliow my improvement as applied to a compound engine of the class where the two cylinders stand side by side,connected by the proper steam passages so arranged that the piston of the cylinder which first receives the steam, under prcssnre,becon1cs the valve which controls the ports leading to the other cylinder, where the steam is used 'by expansion, I do not desire to confine myself to this special class of engines, as my improvement may be applied in the inlet and exhaust ports of engines of other and more simple classes.

Figure l is a central vertical section through the two cylinders of a compound engine standing side by side. Fig. 2 is a crosssection on the line a a in Fig. 1.

In the accompanying drawings, which form a part of this specification, A. represents the cylinder of a steam-engine provided with the ports 13 C (J, the ports B communicating alternately with a steam-chest (not shown) and with the exhaust-port through the passage 0. Thus it will be seen that the space between the piston-heads D and E of the cylinder A communicates with the open air through the port-C, and alternately with the ends of the cylinder A through the passage C, valve 8, and ports B.

F is the expansioncylinder, provided with 5 its piston G. In the wall H, which is the division-wall common to both cylinders, are the steam-passages I and J, communicating at one end with the cylinder A and atthe other with the cylinder]? in such manner that the more ment of the piston-heads D and E will control such steanrpassagesso that such movement in one direction will disclose one of said steampassages,allowing steam under pressure in the cylinder A to escape into the cylinder F at the opposite end, whereit acts by expansion, and vice versa.

In suitable seats bored or formed in the wall H are situated the two two-way valves K, each of which is provided with a crank-stem, L, and each of these cranks is connected by means of a suitable pitman, M, to a suitable wrist-pin, N, suitably secured to the crank O, which is pivotally secured upon a stud-shaft, I, which preferably is formed on the wall of one of the cylinders, or such shaft may be supported upon a proper standard. This crank O is provided with a handle, Q, by means of which the position of the two-way valves may be simultaneously reversed, thereby reversing the direction of the steaurcurrcnts, by which means the travel of the piston is reversed.

The reversing-gear hereinbcfore described is intended to reverse the piston G of the cylinder E, as such reversal will not be accomplished by the mere reversal of the main valve which governs the admission of steam into the cylinder A. Thus, to reverse the motion of the engine, the engineer takes hold with one hand of the reversing-gear of the main valve and with the other the handle Q, and reverses them both simultaneously. The handle Q therefore has to be in proper proximity to the reversing-gear of the main valve to have it in convenient position for such operation.

If the arrangement of steam-passages and valves as described for the cylinder E is ap plied to the main eylinderA instead of to the cylinder F, the reversal of both pistons would be accomplished by the reversal of the valves K alone without the use of another reversinggear.

hat I claim as my invention is- 1. In a steam-engine composed of two cyl inders side by side, with a division-wall common to both, wherein the steam-passages connecting said cylinders are formed, the two-way valves located within said passages and coupled to a wrist-pin common to both valves,

whereby the same may be simultaneously operated in combination with the piston-heads D E, secured to a single stem and working within the cylinder A, with the exhaust-port C of said cylinder located between them, and the single valve B, controlling the admission of steam alternately to the ends of the cylinder A, and at the same time exhausting the steam from the opposite end through itself into the space between the heads D and E, substan tially as shown and described.

2. In a compound engine, two cylinders, A and F, valves K between the same, the cylinder A,provided with two separate ports,B, starting from the ends and terminating at ISAAC A. TURNER.

Vitnesses:

J. PAUL MAYER, H. S. SPRAGUE. 

